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Originally Posted by TeleMad
There is no path for a hand or medical device to travel from the outside of my body to that mostly digested food that does not pass through my skin and other tissues
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The traditional definition of "inside the body."
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Originally Posted by TeleMad
...or require me opening my mouth (or the other end).
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Your added contingency.
I'm pretty sure that the cellular structure of the GI tract is similar devlopmentally to the skin, but I'll have to look that up.
